/*
 * Amazon Style Store - 响应式样式
 * 移动端优先设计
 */

/* 小屏幕 (手机) - 默认样式已适用 */

/* 中等屏幕 (平板) */
@media (min-width: 576px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    h1 {
        font-size: 2.75rem;
    }
    
    h2 {
        font-size: 2.25rem;
    }
    
    .col-sm-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
    
    .col-sm-4 {
        flex: 0 0 33.333%;
        max-width: 33.333%;
    }
    
    .col-sm-3 {
        flex: 0 0 25%;
        max-width: 25%;
    }
}

/* 大屏幕 (桌面) */
@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .col-md-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
    
    .col-md-4 {
        flex: 0 0 33.333%;
        max-width: 33.333%;
    }
    
    .col-md-3 {
        flex: 0 0 25%;
        max-width: 25%;
    }
    
    .col-md-2 {
        flex: 0 0 16.666%;
        max-width: 16.666%;
    }
    
    /* 桌面端隐藏移动端切换器 */
    .mobile-language-currency-switcher {
        display: none !important;
    }
}

/* 超大屏幕 */
@media (min-width: 992px) {
    .col-lg-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
    
    .col-lg-4 {
        flex: 0 0 33.333%;
        max-width: 33.333%;
    }
    
    .col-lg-3 {
        flex: 0 0 25%;
        max-width: 25%;
    }
}

/* 移动端特定样式 */
@media (max-width: 767px) {
    /* 头部适配 - 新版布局：左侧折叠菜单，右侧账户购物车 */
    .header .container {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        padding: 8px var(--spacing-md);
        gap: 8px;
    }
    
    /* 左侧组：菜单按钮（最左侧） */
    .mobile-menu-button {
        display: block;
        order: 1;
        flex: 0 0 auto;
        margin-right: 8px;
    }
    
    /* 中间组：logo */
    .logo {
        order: 2;
        flex: 0 0 auto;
        margin-right: auto;
    }
    
    /* 右侧组：账户和购物车 */
    .nav-tools {
        order: 3;
        margin-top: 0;
        width: auto;
        border-top: none;
        padding-top: 0;
        flex-wrap: nowrap;
        gap: 12px;
        padding-left: 0;
        padding-right: 0;
        display: flex;
        align-items: center;
        justify-content: flex-end;
        flex: 1;
    }
    
    /* 隐藏桌面端切换器 */
    .nav-tools .desktop-switcher {
        display: none !important;
    }
    
    .nav-tool {
        font-size: 0.625rem;
        flex: 0 0 auto;
        padding: 4px 0;
    }
    
    .nav-tool i {
        font-size: 1rem;
    }
    
    /* 搜索栏 - 移动到第二行 */
    .search-bar {
        order: 4;
        margin: 8px 0 0 0;
        max-width: 100%;
        flex: 0 0 100%;
    }
    
    /* 主导航菜单移动端 */
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--amazon-dark);
        z-index: 1000;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }
    
    .main-nav.active {
        display: block;
    }
    
    /* 移动端语言货币切换器样式 */
    .mobile-language-currency-switcher {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
        padding-bottom: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .mobile-language-currency-switcher .language-switcher,
    .mobile-language-currency-switcher .currency-switcher {
        flex: 1;
    }
    
    .mobile-language-currency-switcher select {
        width: 100%;
        background-color: var(--amazon-black);
        color: var(--amazon-white);
        border: 1px solid rgba(255, 255, 255, 0.3);
        padding: var(--spacing-sm) var(--spacing-md);
        border-radius: var(--border-radius-sm);
        font-size: 0.875rem;
        cursor: pointer;
        appearance: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%23FFFFFF' d='M5 7L1 3h8z'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
        background-size: 10px;
    }
    
    .mobile-language-currency-switcher select:hover {
        background-color: #333333;
        border-color: rgba(255, 255, 255, 0.5);
    }
    
    .mobile-language-currency-switcher select:focus {
        outline: none;
        border-color: var(--amazon-orange);
        background-color: #444444;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-menu li {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu a {
        display: block;
        padding: var(--spacing-sm) 0;
        color: var(--amazon-white);
        text-decoration: none;
        font-size: 0.875rem;
    }
    
    .nav-menu a:hover {
        color: var(--amazon-orange);
    }
    
    /* 产品网格移动端 */
    .product-grid .col {
        flex: 0 0 100%;
        max-width: 100%;
        margin-bottom: var(--spacing-lg);
    }
    
    /* 购物车侧边栏移动端 */
    .cart-sidebar {
        width: 100%;
        height: 80vh;
        border-radius: 0;
    }
    
    /* 页脚移动端 */
    .footer-columns {
        flex-direction: column;
    }
    
    .footer-bottom-links {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
}

/* 平板特定样式 */
@media (min-width: 768px) and (max-width: 991px) {
    .search-bar {
        max-width: 400px;
    }
    
    .nav-tool {
        font-size: 0.6875rem;
    }
    
    .product-grid .col {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .nav-tool,
    .footer-links a {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    select,
    input[type="number"] {
        font-size: 16px; /* 防止iOS缩放 */
    }
}

/* 打印样式 */
@media print {
    .header,
    .footer,
    .cart-sidebar,
    .top-bar,
    .mobile-menu-button,
    .search-button,
    .btn {
        display: none !important;
    }
    
    body {
        color: #000;
        background: #fff;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* 黑暗模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --amazon-light-gray: #232F3E;
        --amazon-border: #37475A;
        --amazon-white: #131A22;
        --amazon-dark: #FFFFFF;
    }
    
    body {
        background-color: #0F1419;
        color: #E3E6E6;
    }
    
    input, select, textarea {
        background-color: #232F3E;
        color: #E3E6E6;
        border-color: #37475A;
    }
}